 #按照这个顺序来定义参数：必填参数、位置不定长参数、默认参数、关键字不定长参数
def add(a, b, *args, count ='china', **kwargs):
    print(a, b)
    print(args)
    print(count)
    print(kwargs)


add('a', 'b', count='usa', age=22, add='new')
